Transom-lifter



(No Model.)

G. M., GARLAND. TRANSOM LIFTER.

No. 513,913. Patented Jan. 30, 1894.

"i 13 1? If a a //4/ 2 J M/ W/ TNE SSE S lNVENTOl-T Maw/M A TI'OHNEYS.

UNITED STATES PATENT OFFICE.

GEORGE M. GARLAND, OF DES PLAINES, ILLINOIS.

TRANSOM-LIFTER.

SPECIFICATION forming part of Letters Patent No. 513,913, dated January 30, 1894.

Application filed May 15, 1893- Serial No.474,285. (No model.) 7

To aZZ whom it may concern:

Be it known that I, GEo GE M. GARLAND, of Des Plaines, in the county of Cook and State of Illinois, have invented a new and Improved Ventilator-Worker, of which the following is a full, clear, and exact description.

My invention relates to improvements in ventilator workers and especially to such as are adapted to operate ventilators in the roofs or walls of buildings; and the object of my invention is to construct a simple mechanism by which one or a series of ventilators may A proved ventilator worker as applied to a single ventilator. Fig. 2 is a detail sectional View of the same. Fig. 3 is a detail cross section, showing how the cable is clamped to the lever which works the ventilator; and Fig. 4 is an enlarged detail View of the gear mechanism adapted to work the cable when a comparatively large-number of ventilators are connected therewith, the gear mechanism being designed to furnish increased power.

The ventilator 10 is of the usual swinging kind and is hung to swing in the frame 11 of the roof 12 insubstantially the usual way.

The ventilator is provided with braces 13 and 14 which are pivoted to it, the former at its free end and the latter near its hinged end, and these braces are pivotally connected With one arm 15 of a bell crank 16, which is fulcrumed on the frame 11 opposite the free edge of the ventilator and preferably on a wear plate 17, and the other arm 18 of the bell crank extends downward and is clamped to a cable 19, which, when moved longitudinally, tilts the bell crank and works the ventilator. The connection between the arm 18 and the cable 19 is by means of a clamping ring 20, which encircles the cable and a bolt 21 which projects through the arm into the ring and impinges on the cable. The cable 19 may be connected with a series of ventilators by means of bell cranks like thatjust described, and the cable runs over suitable pulleys 22 which are mounted in suitable supports and one of which is provided with a crank 23. It will be seen that by turning the crank the cable may be moved in a desired direction so as to tilt the bell crank 16 in a manner to open or close the ventilator.

Where very many ventilators are operated by a single cable, the form of mechanism illustrated in Fig. 4 is preferably employed to move the cable, as this arrangement furnishes greater power and also enables the ventilator to be more conveniently locked in a certain position. As here shown, a crank shaft 24 is journaled in a suitable supporting frame 25 and is provided with a squared end 26 to which a crank may be attached. The shaft 24 is geared to a shaft 29, which is parallel with it, by means of gear wheels 27 and 28, and the shaft 29 connects by gear wheels 31 and 32 with a drum 33 which is also journaled in the frame 24and around which the cable 19 is wound several times. The gearing described is arranged to increase the power,.and any suitable gear mechanism may be employed. 0n the shaft 24 is a ratchet wheel 34 which is engaged by a pawl 35 and in this way the shaft 24 may be locked so as to prevent the moving of the cable and the dropping of the ventilator. When the crank shaft 24 is turned, the drum 23 is also revolved and this causes the cable 19 to be moved so as to work the bell cranks and ventilators connected with it.

Having thus described my invention, I claim and desire to secure by Letters Patent- A transom worker, comprising the laterally swinging bell crank lever 16 pivoted at its angle to the transom frame a rod 13 pivotally connecting the outwardly extending arm 15 of said lever with the free end of the tran-.

strand or cable connected directly with the lower end of the arm 18 of the bell crank as at 20, substantially as set forth.

GEORGE M. GARLAND.

Witnesses:

H. WITTBOLD, G. WITTBOLD.

. p A p 1| 

